Explosive.



parts, by weight,

UNITED STATES PATENT Grinch.

EMIL ALLENBERG, OF HALTERN, GERMANY, ASSIGNOR TO ALEXANDER JOHNSTON BROWN, OF MATLOOK, ENGLAND.

EXPLOSIVE.

SPECIFICATION formingpart of Letters Patent No. 644,403, dated February 27, 1900. Application filed April 5, 1899. Serial No. 711 ,766. (No specimens.)

plosive, of which the following is a specifica-' tion.

This invention relates to an explosive which, while possessing explosive qualities equal to carbonite, is extremely safe for use in coalmines and other places, owing to the fact thatit is practically fiameless.

In carrying out the invention I take four of turpentine-oil and add thereto one part of collodion cotton. The mixture is heated in a water-bath at a temperature of about 40 centigrade, and then thirty parts, by weight, of nitroglycerin are added. Thereupon the temperature of the bath is raised to or centigrade. The

mass in the bath gelatinizes very quickly and uniformly. The gelatin thus produced is mixed with forty parts nitrate of potash, twenty-seven parts Epsom salts, and one part soda, (which neutralizes any acetic or formic acid which may be produced through the oxidation of the turpentine-oil,)and the whole is put into a suitable ball-mill and kneaded.

The material when ready can be fed into screw conveyers, such as are at present generally used in the manufacture of explosives, and formed into the desired shapes, such as cartridges, 8:0.

I have merely given the above proportions by way of illustration or example, and it is to be understood that they may be varied or altered to suit the different purposes for which the explosive is to housed.

By the use of turpentine-oil I secure a considerable amount of carbon without much, if any, oxygen; also, a liquid which is soluble in nitroglycerin with collodion cotton and at the proper temperature forms a very fine gel-' atin, which is the term of my improved explosive. 'lurpentine-oilreduccs the tcmporature of explosion and also the sensibility of an explosive containing nitroglycerin, so that an explosive containing same in proper proportions Will not ignite readily and can only be exploded by means of a detonator. The turpentine-oil also reduces the freezing point to 6 Celsius, a result notheretot'ore attained in such explosives.

IIavingnow fully described my invention, what I claim, and desire to secure by Letters Patent, isi r 1. An explosive composed of turpentineoil, collodion cotton and nitroglycerin in the proportions substantially as described, the same heated to form a jelly, and mixed with nitrate of potash, Epsom salts and soda, substantially in the manner, and for. the purposes setforth.

2. An explosive composed of turpentineoil four parts, collodion cotton one part, and nitroglycerin thirty parts, heated together to form a gelatin, and mixed with forty parts nitrate of potash, twenty-seven parts of Epsom salts and one part of soda, the whole suitably mixed and kneaded, substantially as described.

Signed at IIaltern, \Vostphalia, Germany, this 16th day of March, 1899.

EMIL CALLENBERG.

Witnesses WILLIAM GALL, THOMAS GRACE. 

